Delay in uS

JulsPower · Joined: 18 Feb 2008 Posts: 11

Hi
its me
again I know

I got some probly with delay_us

while(TRUE) //Main Loop
{
if(k==200)
{
output_toggle(PIN_A4);
k=0;
}
k++;
delay_us(500);
}

and

while(TRUE) //Main Loop
{
if(k==400)
{
output_toggle(PIN_A4);
k=0;
}
k++;
delay_us(250);
}

should be the same right?
first one the led if flashing at right speed
but second one too much fast what is happening there?

should I use a timer to do this?

bwhiten · Joined: 26 Nov 2003 Posts: 151 Location: Grayson, GA

What type is "k"?

Franck26 · Joined: 29 Dec 2007 Posts: 122 Location: Ireland

Hi JulsPower,

I don't now what is the problem, maybe the type of k like suggested by bwhiten, but in every case it will be better for you to use a timer.
Your micro is spending is time in the "delay_us" function. It won't be able to do anything else...

Franck.

RLScott · Joined: 10 Jul 2007 Posts: 465

JulsPower · Joined: 18 Feb 2008 Posts: 11

ooh you are all right
it was a int
but i already made it with a timer
and soon with int

Guest · Posted: Wed Mar 05, 2008 4:40 pm